Jean  marie anatole gerard



M h s M e h s 2, m Am R Em @n AA w MR Tm m. d .0, .M o m lNo. 600,671.'

` Patented Mai. 15, 1898.

(No mmap.) 2 sheets-sheec 2..

34M., A. @ERARD ROTARY MOTOR..

No 660,671. Patented Mar. 15,1898.

mi 1% venan ihviTED STATES FATENT- EFICE.

JEAN 'MARIE ANA'roLE GERARD, or PARIS, FRANCE, Assisi-von 'ro LA SOCIETELnNDUs'rRIELLE, or SAME PLACE.

ROTARY MOTO R.

SPECIFICATION forming part of Letters Patent No. 600,671, dated March15, 1898.

Application led JulylQ, 1897. Serial No. 645,087. (No model.) l

' of steam employed in these motors by furnishin g a means for workingwith double and `even triple expansion, if desired.

rlhe invention consists in the arrangement of parts hereinafterdescribed and claimed.

ln the accompanying drawings, Figure l is a transverse vertical sectionof the motor on the (line mof Fig. 2; Fig. 2, a plan view with the partsin section on the line x .fr of Fig'. 1

i parts.

andwith the movable parts removed. Figs. 3, 4, and 5 are detail viewsindicating various positions of the dist-ributing-valves. Fig. G

is a vertical section on the line y @j of Fig. 7,

showing a modification of Vthe distributing Fig. 7 is a plan view.

The machine shown in Figs. 1 and 2 is composed of two similar cylindersA A', separated by a partition, and there is arranged in each cylinder adisk piston B, mounted on a crank b of the motor-shaft a in such a Wayas to revolve and circle freely on the periphery of the cylinder. Thetwo cranks are placed at one hundred and eighty degrees to one anotheron the shaft ce, the latter passing through 4the ends of the twocylinders, which have a common dischargepipe c. Each cylinder A4communicates with a cylinder D, placed atV right angles to it andclosed at, its upper end by a plate d, which has a semicylindricaloscillating valve E, serving to regulate the admission into the cylinderD of steam arriving by the pipe F.' In the cylinder D there is arrangeda piston or slidingblock G, forming a tight-fitting partition orabutment capable of protruding into the cylinder A, and this piston isprovided on its lower face with a second semicylindrical oscillatingValve H,

the lower face of which bears on the circling disk pist-on B and forms atight joint on this disk. The two valves E and Il rest in oppositedirections on their` seats and are provided with arms e and z, connectedby a pin f, which is-fixed on one arm but free to Work in a grooveonslot formed in the other arm or in other suitable manner. Finally, themovements of these arms are limited by stops g.

The working of this machine is as follows: In the position indicated inFig. f1 the valve Il, resting on the disk B, assumes an inclinedposition and by the intermediary of arms h and c forces the valve E toincline itself inV the other direction. In these positions the orifice iof the lower valveis closed and the oriiice j of the upper valve isopened and gives passage to the steam arriving by the pipe F, whichsteam forces the piston G downward and presses the valve H strongly onthe disk B. This-pressure being inclined in the direction of the arrowacts on the crank b, and this motive action, which commences as soon asthe center of the disk B comesto the right of the vertical, is`continued nntil the tangential point kof the disk reaches k'. In thisposit'on (shown in Fig. 3) theoriice g of the valve E is closed andshuts off all communication of the cylinder D with the boiler, and theorifice iof the valve H opens and allows the 'volume of steamcontained'in the cylinder D to penetrate into the cylinder A, where itacts by expansion on 'the disk piston B. Vihen the point of contact ofthis diskB has reached 7a2, Fig. 4, the orifice ,7 is still closed, andthe orifice t' remaining open the expansion of the steam continues to beproduced until the point of contact of the revolving disk B reaches 'thedischarge-orifice c. At this mom enti, when the discharge is eected, thetwo oriiices 1I and j are closed, as Ashown in Fig. 5, which figureshows the position of i the valves when the disk B is at the highest'point of. its course.` The same actions are then reproducedperiodically.- It will therefore be. seen that the cylinderD acts withfull pressure for a half-rotation of the disk piston Y and that thecylinder A acts `by expansion during the second half-rotation of thesaid disk. e It is evident that during the irst halfrotation of thedisk, as the orifice i of the roo Y valve H remains closed, there willbe produced in the right-handl half of the cylinder- 'A a vacuum whichwould oppose a deleterious resistance to the movementof the disk. Inorder to avoidithis drawback, a discharge Z is arranged in the partitiondividing the two expansion-cylinders A and A',1and the position of thedisk placed behind this partition is indicated in dotted lines in Fig. 1`and shows that the cylinder A contains at this moment steam whichexpands and which ,could freely passJ then into the right-hand -part ofthe cylinder A and thus act on the disk B during the second half. o fits rotation. Owing to the use of the passage or .port Z there istherefore produced an important increase in the volume devoted to theexpansion of the steam and which may be considered as a double usefulexpansion of the mo- `tive steam', andA it is evident that the sameeffects4 will be produced alternately in the two cylinders A and A',arranged back to b ack.

Instead of using two cylindrical valves E and H, the reciprocalmovements oi" which are determined by the connection of their arms e andh, the arrangement shown in Figs.V 6 and 7 of the accompanying drawingsmay be'employed. In this arrangement the lower, hollow valve H is notmodified; but the upper one E is replaced bya valve m, provided withopenings n' on its periphery and which receives. at given moments aslight rotary movement sulicientl to open or to clos'e' theadmissionopenings o, arranged in its seat d. For this object the valve mis fixed on a spindle p, provided near its extremities with' helicoidalcams r and lr", and the piston G is provided with a cross-piece t,having helicoi dal cams s s at each side. These cams are arranged insuch a way that when the piston G reaches the summit of its course-thefixed cam s encounters the cam 'r of the spindle p and brings theopenings n o f the valve into register with the openingso, formed/in itsseat, which thus allows the steam to pene# trate into the cylinder d.While the piston G is descending again, the opening remains open. `I(SeeFig. 6.) When the piston IG reaches the bottom of its course, thefixed cam's encounters the cam fr of the spindle p and displaces thevalve m, the solid parts, of

which close the openings o, interrupting, all

communication of the cylinder d with the boiler. This action is' thenreproduced at each revolution of the disk B. The play of the cylindricalvalve Huot being modified it is evident that the mode of working of the:

motor remains the. same as 4in the preceding case.

It is evident that I do not limit myself to the arrangements and partshereinbefore described in order to'insure the distributionof the steamin the machine,vthe said arrangements being capable of being varied`without modifying the spirit on which it is based, and, 'f

similarly', I 'may employ more than two cylinders A, coupled one to theother, if I judge it necessary.

I declare that what I'claim ils- 1. In a compound rotary motor composedof a cylinder having a discharge-pipe and containing a revolving pistonworking by expanp sion, and of a second cylinder carrying the inlet-pipeand containing a pistonhaving a rectilinear movement acting with.fullpres- Sure and bearing directly on the periphery of the revolvingpiston: the combination with l a semicylindricaloscillating valve H forre ulating the admission into the first cylinder A, of a valve mrevoluble on its seat and havvmg openings for regulating the` admissioninto the second cylinder,l the spindle-of the said'valve being providedat its extremities with helicoidal cams adapted to b ealternatelyactuated at each end of the course 'of the `piston G by similar cams onthis-piston, substantially as heieinbefore lset forth.'

2. The combination with a single motorshaft, of two similar rotarycompound motors coupled and acting successively by direct action on thesaid motor-shaft, eachcompound motor comprising au expansion-cylindercontaining a revolving piston and which is separated from the adjacentcylinder by a partition having an opening placed near the point Where`the steam admission is effected and `each expansion-cylindercommunicating I los

